Creation: Created in 1942 as a renumbering of SC 211 #2. Ran the way it does now. This renumbering was done so that NC could match the number (NC 211 in eastern NC went back to 1923) when it upgraded its side to primary routing.
Adjustments: None
Improvements: SC 160 was paved upon designation.
No multilane sections shown on the 2005 Official map.
Comment: SC 160 serves Fort Mill.

Creation: Created about 1930 as new routing. Originally ran only from SC 16 (current US 321) Filbert northwest to NC, continuing as NC 215. This is the 2nd SC 161.
Adjustments: In 1959, SC 161 was extended through York and east to its current ending at US 21. This was mostly a replacement of SC 5. East of the SC 274 SB split was promoted secondary route.
In 1986 or 1987, SC 161 was moved onto the SC 5 bypass of York, leaving behind US 321 Business and SC 5 Business, and tiny SC 5-161 CONN east of York.
Improvements: Fully paved by 1932
The US 321 multiplex was 4-laned between 1965-67.
No other multilane segments shown on 2005 Official Map.
Comment: SC 161 serves the back entrance to the Kings Mountain State and National Parks.
SC 161 provides a north bypass of Rock Hill for York traffic trying to reach I-77.

Previous SC 161's:

SC 161 #1: Appeared in 1923 as new primary routing. Ran from SC 16 (current US 21-321) Eau Claire northwest to SC 22(current SC 34).
In 1925 or 1926, SC 161 was extended northwest as new routing to SC 7 (current SC 72-121) Leeds.
The 1926 Rand McNally Auto Trails inset of Columbia shows SC 161 as making it down to at least SC 2 (current US 176) Main St.
In 1928, SC 161 was renumbered as part of SC 215.

Creation: Appeared in 1942 over what was an unnumbered road at the time, although in 1938 may have been US 17 ALT, and was definitely US 17 before 1937. SC 162 ran as it does today, plus multiplexed with SC 174 north to almost Osborn, then headed west to Parkers Ferry before turning north and ending at Fishburne Landing along the Edisto River. This made SC 162 22 miles long.
Adjustments: In 1948, SC 162 was truncated to run as it does today. This left behind: SC 174, S-10-40, and S-10-38.
Improvements: SC 162 east of Parkers Ferry was paved upon designation. All parts were paved in 1948.
No multilane sections are shown on the 2005 Official Map.
Comment: SC 162 is also the routing of today's SC 6 when it used to run from Charleston to Walterboro.
SC 162 also serves the town of Hollywood.

SC
163 not currently assigned

Previous SC 163's:

SC 163: Appeared in 1925 or 1926 as new primary routing. Ran from SC 16 (current US 321 Business) York northeast to the North Carolina State Line. At first, NC did not have a route to meet up with SC 163, but later sent NC 15 down from Charlotte.
In 1937, SC 163 was renumbered as SC 49.

From: north of Barrelville (Charleston County)To: Charleston County. Total Length: 2.5 miles

ROUTE LOG
SC 174: 0 - 0
SC 162: 2.5 - 2.5

Creation: Created as new primary routing in 1942. Ran as it does today.
Adjustments: None
Improvements: SC 164 was paved upon designation; no multilane sections on the 2005 Official Map
Comment: SC 164 provides a short cut for Edisto Beach traffic who were using SC 162 instead of US 17.

Creation: Created in 1939 as new primary routing. Originally ran only from US 17 Ravenel south through Hollywood and ending in Yonges Island.
Adjustments:In 1951 or 1952, SC 165 was extended north as new construction to Cooks Crossroads, then as a replacement for SC 61 to Summerville, and northwest out of town to end at US 78 in Brownsville.
In 2000, SC 165 was rerouted to avoid Downtown Summerville as it does today. This was new construction for the most part, but did use a little S. Gum St. The old route through town became S-18-65 and the US 17 ALT piece stayed as is.
Improvements: SC 165 was fully paved upon designation
A small piece of SC 165 above US 17 ALT was multilane by the early 80's.
By the late 80's, SC 165 was multilane around the Trolley Rd (S-18-199) area.
The extension around Summerville to US 17 ALT near I-26 is multilane.
Comment: SC 165 below SC 61 is a dark, scary ride through the swamp, especially in the middle of the night.
SC 165 may have used Stallsville Rd (S-18-9) between Bacons Bridge Rd and Trolley Rd. at some point.

SC
166 not currently assigned

Previous SC 166's:

SC 166: Appeared in 1941 or 1942 as new primary routing. Ran from US 21 to US 17 (current US 17 ALT) Hendersonville, a distance of 9 miles.
In 1948, SC 166 was downgraded to S-15-28.

SC
167 not currently assigned

Previous SC 167's:

SC 167: Appeared in 1941 or 1942 as new primary routing. Ran from SC 11 near Gaffney northwest to the North Carolin State Line, 6 miles away.
The North Carolina side has never been primary routing, just always Wood Rd.
In 1948, SC 167 was downgraded to S-11-34.

SC
169 not currently assigned

Previous SC 169's:

SC 169: Appeared in 1940 as new primary routing. Ran as a 4 mile spur east off SC 170 in the Chelsea area.
In 1941 or 1942, SC 169 was extended east 2 more milesto the Checheese River.
In 1948, SC 169 was downgraded to S-7-18. Today, modern SC 170 runs over some of this.